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β-Galactosidase (EC 3.2.1.23) is a hydrolase which plays an important role in cell wall modification and fruit softening during ripening. In this study, three fulllength β-galactosidase cDNA clones were successfully obtained from papaya mesocarp using different approaches. pPGBII which is 2,771 bp in size, was isolated from a papaya ripe mesocarp cDNA library using a heterologous probe. The other...
Assessing the level of river water quality periodically is important in ensuring that the river water is safe for consumption. This study investigates the level of water quality at Skudai River from year 2002 to 2006. Twenty parameters were identified and used in this analysis. These twenty parameters are recorded at nine monitoring stations located along the Skudai River. Multivariate statistical...
A study was carried out to investigate customer satisfaction level towards the public transportation services provided by Consortium Express Bus Company. 200 respondents consisting of 65 men and 135 women participated in the study survey. The survey was conducted in three bus stations in Kuala Lumpur and Selangor areas, namely Pudu Bus Station, Kajang Bus Station, and Putra Bus Station. Importance-Performance...
LUC cryptosystem is a public key cryptosystem based on Lucas functions. The encryption of this cryptosystem is relatively easy since we have the knowledge of public key e, two primes p and q and also the message M. Meanwhile, decryption process is difficult without the knowledge of private key d. In this paper, we are presenting a technique that can be used to compute private key for LUC cryptosystem...
The encryption process of LUC Cryptosystem is Ve(P,1)(mod N), while the decryption process is Vd(C,1)(mod N). An N is a product of two relatively primes p and q, P is a message and C is the ciphertext. To compute Ve and Vd, this system used Lucas Function. The Lucas Functions is a special form of second order linear recurrence relation using a large public integer. Recently, methods for fast LUC Cryptosystem...
Lucas Functions is a special form of second order linear recurrence relation. This function has been used in the LUC Cryptosystems. The encryption process of this system is the computations of V(e), while the decryption process is done by the computations of V(d). The V(e) and V(d) are both Lucas Function. The performances of computations of LUC are influence by the size of e and d. It is also depends...
The major factor that influences the performance of the LUC public-key cryptosystem is the computation of Ve and Vd, a public and private key, respectively. Its involve a huge steps of computations for large values of e and d. We concentrated our discussion on how to utilize and manipulate the doubling step technique for an efficient LUC2 computation. Therefore, we proposed the so-called doubling...
New co-polyhydrazides, which contain spacer groups consisting of carbohydrates, methylene groups or aromatic moieties and also having pendant groups were synthesized by low temperature solution polycondensation of diacid dihydrazides with diacid dichlorides in DMF (Scheme 1). One example of the prepared co-polyhydrazides was cyclized into copoly(1,3,4-oxadiazole); which was treated with ammonia for...
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